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Long QT syndrome is a heart rhythm disorder that can potentially cause fast, chaotic heart beats. These rapid heart beats may trigger a sudden fainting or seizure. In some cases, your heart may beat erratically for so long that it can cause sudden death. ... moreLong QT syndrome is a heart rhythm disorder that can potentially cause fast, chaotic heart beats. These rapid heart beats may trigger a sudden fainting or seizure. In some cases, your heart may beat erratically for so long that it can cause sudden death. Many people with long QT syndrome don”t have any sign or symptoms. The most common symptoms include fainting, seizures, sudden death. Most people who experience sign or symptom from long QT syndrome have their first episode by the age of 40. Treatment include medications or surgery. less
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Accelerated idioventricular rhythm is an automatic ectopic ventricular rhythm whose rate is greater than 49 beats/ minute but less than 100 beats/ minute. In accelerated idioventricular rhythm, the rate of cardiac contraction is determined by the intrinsi... moreAccelerated idioventricular rhythm is an automatic ectopic ventricular rhythm whose rate is greater than 49 beats/ minute but less than 100 beats/ minute. In accelerated idioventricular rhythm, the rate of cardiac contraction is determined by the intrinsic rate of depolarization of the cardiac cells. It can be present at birth. In normal heart the sinoatrial node in the upper chamber of heart depolarizes at a rate of 70 beats per minuteas an effect of the autonomic nervous system. This suppresses the intrinsic depolarization of the other part of the heart. Accelerated idioventricular rhythm occurs when depolarization rate of a normally suppressed focus increases to above that of the higher order focuses. Accelerated idioventricular rate appears similar to ventricular tachycardia but is benign and doesn”t need any treatment. less
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Ventricular fibrillation is a severely abnormal heart rhythm that can be life threatening. A person who has a ventricular fibrillation episode will suddenly collapse, because the brain and muscle have stopped receiving blood from the heart.There may be sy... moreVentricular fibrillation is a severely abnormal heart rhythm that can be life threatening. A person who has a ventricular fibrillation episode will suddenly collapse, because the brain and muscle have stopped receiving blood from the heart.There may be symptoms 1 hour before collapse like chest pain, dizziness, nausea, rapid heart beat, shortness of breath. During ventricular fibrillation blood is not removed from the heart, sudden cardiac death results. The most common cause of ventricular fibrillation is a heart attack. Most people with ventricular fibrillation have no history of heart disease. However, many have risk factors for cardiovascular disease, such as smoking, high blood pressure and diabetes. Ventricular fibrillation is a medical emergency and must be treated immediately to save a person”s life. Treatment is by defibrillator. less
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Ventricular tachycardia is a rapid heartbeat that starts in the ventricles. Symptoms are chest discomfort, fainting, dizziness, palpitations, shortness of breath, light headedness. Symptoms may start and stop suddenly. In some cases there is no symptom. V... moreVentricular tachycardia is a rapid heartbeat that starts in the ventricles. Symptoms are chest discomfort, fainting, dizziness, palpitations, shortness of breath, light headedness. Symptoms may start and stop suddenly. In some cases there is no symptom. Ventricular tachycardia can develop as an early or late complication of a heart attack. It may also occur in patients with heart failure, heart surgery, cardiomyopathy, valvular heart disease. It can also be caused by medication, blood change in pH and chemistry, lack of oxygen. Treatments depend on the symptoms and underlying cause. Some people may not need treatment. Treatment include drug and defibrillation in emergency case. less
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Junctional rhythm describes an abnormal heart rhythm resulting from impulses coming from a locus of tissue in the area of the atrioventricular node, the "junction" between atria and ventricles.Under normal conditions, the heart's sinoatrial node... moreJunctional rhythm describes an abnormal heart rhythm resulting from impulses coming from a locus of tissue in the area of the atrioventricular node, the "junction" between atria and ventricles.Under normal conditions, the heart's sinoatrial node determines the rate by which the organ beats - in other words, it is the heart's "pacemaker." The electrical activity of sinus rhythm originates in the sinoatrial node and depolarizes the atria. Current then passes from the atria through the bundle of His, from which it travels along Purkinje fibers to reach and depolarize the ventricles. This sinus rhythm is important because it ensures that the heart's atria reliably contract before the ventricles.In junctional rhythm, however, the sinoatrial node does not control the heart's rhythm - this can happen in the case of a block in conduction somewhere along the pathway described above. When this happens, the heart's atrioventricular node takes over as the pacemaker]. In the case of a junctional rhythm, the atria will ac less
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Multifocal atrial tachycardia (MAT) is a cardiac arrhythmia caused by multiple sites of competing atrial activity. It is characterized by an irregular atrial rate greater than 100 beats per minute (bpm). Atrial activity is well organized, with at least 3 ... moreMultifocal atrial tachycardia (MAT) is a cardiac arrhythmia caused by multiple sites of competing atrial activity. It is characterized by an irregular atrial rate greater than 100 beats per minute (bpm). Atrial activity is well organized, with at least 3 morphologically distinct P waves, irregular P-P intervals, and an isoelectric baseline between the P waves.Shine, Kastor and Yurchak first proposed this definition of MAT in 1968.[1] MAT has previously been described by terms such as chaotic atrial rhythm or tachycardia, chaotic atrial mechanism, and repetitive paroxysmal MAT.Usually, treatment of the patient's underlying problem (eg, respiratory failure, sepsis, theophylline toxicity) takes therapeutic precedent. The condition is transient and resolves when the underlying condition improves. less
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Atrial flutter (AFL) is an abnormal heart rhythm that occurs in the atria of the heart.[1] When it first occurs, it is usually associated with a fast heart rate or tachycardia (beats over 100 per minute),[2] and falls into the category of supra-ventricula... moreAtrial flutter (AFL) is an abnormal heart rhythm that occurs in the atria of the heart.[1] When it first occurs, it is usually associated with a fast heart rate or tachycardia (beats over 100 per minute),[2] and falls into the category of supra-ventricular tachycardias. While this rhythm occurs most often in individuals with cardiovascular disease (e.g. hypertension, coronary artery disease, and cardiomyopathy), it may occur spontaneously in people with otherwise normal hearts. It is typically not a stable rhythm, and frequently degenerates into atrial fibrillation (AF). However, it does rarely persist for months to years. less
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Atrial fibrillation is a type of arrhythmia. A fast uncoordinated heart rate is called fibrillation. Atrial fibrillation is very abnormal. In atrial fibrillation the upper lobes of the heart beat 400 to 600 times per minute. In response to this, the vent... moreAtrial fibrillation is a type of arrhythmia. A fast uncoordinated heart rate is called fibrillation. Atrial fibrillation is very abnormal. In atrial fibrillation the upper lobes of the heart beat 400 to 600 times per minute. In response to this, the ventricles usually beat irregularly at a rate of 170 to 200 times per minute. Atrial fibrillation is seen in many tipes of heart disease, once established, it usually lasts a lifetime. Atrial fibrillation is a very common heart rhytm disorder. Treatments depend on the type, the severity of the symptoms, the underlying cause and overall health.treatment is by drugs and pacemaker less
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Paroxysmal supraventricular tachycardia is an occasional rapid heart rate. Paroxysmal mean from time to time. Symptoms are anxiety, palpitation, rapid pulse, shortness of breath. Symptom may start and stop suddenly and can last for a few minutes or severa... moreParoxysmal supraventricular tachycardia is an occasional rapid heart rate. Paroxysmal mean from time to time. Symptoms are anxiety, palpitation, rapid pulse, shortness of breath. Symptom may start and stop suddenly and can last for a few minutes or several hours. Paroxysmal supraventriculat tachycardia occurs most often in young people and infants. Paroxysmal supraventricular tachycardia can be increased by alcohol, caffeine and smoking. The treatment depend on the condition or symptom. If there is no symptom, no treatment required. Treatment may include drug and pacemaker. less
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Atrial premature beats is a contraction of the upper heart chamber which occurs before it would be expected. As people age, atrial premature beats tend to happen more frequently even in perfectly healthy individual. It is may be triggered by stress, caffe... moreAtrial premature beats is a contraction of the upper heart chamber which occurs before it would be expected. As people age, atrial premature beats tend to happen more frequently even in perfectly healthy individual. It is may be triggered by stress, caffeine, smoking, and some medicines. The first symptom of atrial premature beats is usually a feeling that the heart has missed a beat. This is oftenaccompanied by a feeling that the heart is pounding in the chest. Atrial premature beat do not usually require treatment. If treatment is necessary it is usually by medication or pacemaker. less
